Addition of biochars to concrete mixtures in replacement of portland cement for development of sustainable concrete.****

在混凝土混合物中添加生物炭以替代波特兰水泥，以开发可持续混凝土。****

基本信息

批准号：
537660-2018
负责人：
MacQuarrie, Stephanie
金额：
$ 1.82万
依托单位：
Cape Breton University
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2018
资助国家：
加拿大
起止时间：
2018-01-01 至 2019-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=658370
关键词：
Addition biochars concrete mixtures replacement

项目摘要

Quality Concrete Ltd. is devoted to implementing sustainable materials for their concrete mixing. Currently up to 20 % of their concrete is held together by a paste made from a mixture of Portland Cement and water. This paste binds the gravel, rock, and sand (aggregates) together to give a malleable, easy to use concrete mixture when wet, and a strong, water resistant product when dry. Portland cement is manufactured by heating caustic limestone with clay in an energy intensive mill at very high temperatures (about 1450°C). This firing process utilizes high quantities of fuel, typically coal or petroleum coke. The process of generating portland cement is unsustainable and exposure to many of its ingredients is potentially dangerous therefore the concrete industry in very interested in sustainable, healthier alternatives. Since Portland cement is a main ingredient that gives the concrete its ideal physical characteristics, it can not be completely replaced, but certain additives can be used to reduce the amount of Portland cement used. Recent studies have shown that reusable natural by-products like charcoal made from biomass can be implemented in the concrete manufacturing process by replacing up to 10% of Portland cement to produce a lightweight, more feasible, concrete product with uniform porosity and increased comprehensive strength. This proposal focus' on identifying local biomass sources (crab, forestry) for conversion to biochar and collaboration with Quality Concrete to test for applicability, stability, strength and durability of the resulting concrete with the addition of various concentrations and types of biochar.

优质混凝土有限公司致力于为其混凝土混合实施可持续的材料。目前，其混凝土的20％是由波特兰水泥和水的混合物制成的糊状物。这种糊状物将重力，岩石和沙子（聚集体）结合在一起，在潮湿时可延展，易于使用的混凝土混合物，并在干燥时具有较强的防水产品。波特兰水泥是通过在非常高的温度（约1450°C）的能量密集型磨坊中加热钙的石灰石来制造的。这种射击过程利用大量的燃料，通常是煤炭或石油焦炭。产生波特兰水泥的过程是不可持续的，并且接触其许多罪行可能是危险的，因此在可持续，更健康的替代方案中非常有趣的混凝土行业。由于波特兰水泥是赋予混凝土理想物理特征的主要物质，因此无法完全替换，但是某些添加剂可用于减少所使用的波特兰水泥的数量。最近的研究表明，可以在混凝土制造过程中实施可重复使用的天然副产品，例如由生物量制成的木炭，可以通过更换多达10％的波特兰水泥来生产具有均匀孔隙率和增加全面强度的轻质，更可行，更具体的产品。该提案的重点是识别局部生物质源（CRAB，林业），以转换为生物炭，并与优质混凝土合作，以测试所得混凝土的适用性，稳定性，强度和耐用性，并添加各种浓度和类型的生物炭。